Total phenolics

Phenolic moulding powders, which before World War II dominated the plastics moulding materials market, only consumed about 10% of the total phenolic resin production by the early 1990s. 

SINGLETON V L and ROSSI J A J (1965) Colorimetry of total phenolics with phosphomolybdic-phosphotungstic acid regents , Am JEnol Vitic, 16, 144-58. 

ANCos B DE, GONZALES E M and CANO M p (2000) Ellagic acid, vitamin C, and total phenolic contents and radical scavenging capacity affected by freezing and frozen storage in raspberry fruit , J Agric Food Chem, 48 (10) 4565-70. 

The use of HPLC for quantification of phenols is often limited to a single class of phenolics and then often only to low-molecular weight compounds that are available as standards. It is, therefore, often necessary to use colorimetric assays such as the Folin-Ciocalteau assay which rely on the reducing ability of phenols to quantify the amount of total phenolics in a sample (Waterman and Mole, 1994 Singleton et al, 1999 Schofield et al, 2001). The degree of condensation of polyphenols can be quantified by colorimetric assays such as the acid-butanol assay and the vanillin assay (Waterman and Mole, 1994 Schofield et al, 2001). 

Spices Rosemary (1000 ppm of extract with 0.92 mmol/g total phenols) Rosemary (200 ppm of extract with 0.92 mmol/g total phenol) Dried chicken meat for soup powder (up to 1000 ppm is acceptable sensorically) Potato flakes for mashed potatoes (up to 200 ppm is acceptable sensorically) Rosemary extract gave better protection than extracts of tea, grape skin or coffee Rosemary extract gave better protection than extracts of green tea, grape skin or coffee Nissen et al., 2000 Nissen et al., 2002... 

MATTILA p and KUMPULAINEN J (2002) Determination of free and total phenolic acids in plant-derived foods by HPLC with diode-array detection, JAgric Food Chem, 50, 3660-67. 

SINGLETON v L, ORTHOFER R and LAMUELA-RAVENTOS R M (1999) Analysis of total phenolics and other oxidation substrates and antioxidants by means of Folin-Ciocalteu reagent, Meth Enzymol, 299, 152-78. 

Yong Ju, Z. and Howar, L.R., Effects of solvent and temperature on pressurized liquid extraction of anthocyans and total phenolics from dried red grape skin, J. Agric. Food Chem., 51, 5207, 2003. 

Kujala, T.S. et al., Phenolics and betacyanins in red beetroot (Beta vulgaris) root distribution and effect of cold storage on the content of total phenolics and three individual compounds, J. Agric. Food Chem., 48, 5338, 2000. 

The total phenolic content in XRPP was 1.10%. The major components were found to be p-hydroxybenzoic acid (0.44%), vanillin (0.19%), syringic acid (0.13%), and syringaldehyde (0.13%). The contents of p-hydroybenzaldehyde, vanillic acid and ferulic acid were 0.032, 0.015 and 0.020%, respectively. Gallic acid, protocatechuic acid and cinnamic acid were detected in trace amounts. 

Al-Mamary, M., Al-Meeri, A., and Al-Habori, M. (2002). Antioxidant activities and total phenolics of different types of honey. Nutr. Res. 22,1041-1047. 

Singleton, V. L., Orthofer, R., and Lamuela-Raventos, R. M. (1999). Analysis of total phenols and other oxidation substrates and antioxidants by means of Folin-Ciocalteu reagent. In "Methods in Enzymology, Oxidant and Antioxidants (Part A)", (L. Packer, Ed.), vol. 299 pp. 152-178. Academic Press, San Diego, CA. 

Figure 6. Time course of effects of 10 ug chlorsulfuron per seedling on total phenolic content of sunflower hypocotyls expressed as -coumaric acid equivalents. Reproduced with permission from Ref. 75. Copyright 1983, J. Plant Growth Regul.

Asami D K, Hong Y J, Barret D M, and Mitchell, AE (2003), Comparison of the total phenolic and ascorbic acid content of freeze-dried and air.dried marionberry, strawberry,... 

Total Phenolics and Phenolic Acids in Plants and Soils 155... 

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